Unfortunately, we do not have a standard Portal solution to monitor Informix databases. We do have an Informix KM which can be used to collect Informix data via Patrol which can then be pulled into Portal as needed. We do recommend you open an Idea regarding the request to add support for Informix databases in Portal.
If you would like to see this functionality added to the BMC Portal, please visit our BMC Communities website and submit an "Idea" for a vote/comments by members of the BMC Community.
Information regarding BMC Communities Ideas can be found here: